You've Been Booed!

Even if you're not super into Halloween, this is such a fun idea and a great way to build community in your neighborhood or even apartment building. Here's how you "boo" someone...

Anonymously deliver a couple of bags of goodies to a couple of neighbors. Include a little paper ghost and instructions for how they continue the game. (basically they continue the game by booing two more people who don't yet have ghosts in their windows).

We found the idea here, and there are even free "You've Been Booed!" printouts with ghosts and instructions here.